Machine for grinding locomotive valve-seats.



PATENTED' NOV. 5, 1907.

J. A. GHADWIGK. MACHINE FOR GRINDING'LOUOMOTIVB VALVE SEATS.

APPLIOATION FILED FEB.12,1907.

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JESSE ALBERT OHADWIOK, OF MOBERLY, MISSOURI.

MACHINE FOR GRINDING LOCOMOTIVE VALVE-SEATS.

Specification of Letters Patent.

Patented Nov. 5, 1907.

Application filed Iebruarv 12. 1907- Serial No. 357,090.

To all whom it may concern:

Be it known that I, .InssE ALBERT CHADWICK, a citizen of the United States, residing at Moberly, in the county of Randolph and State ot' Missouri, have invented certain new and useful Improvements in Machines for Grinding Locomotive Valve Seats, of which the following is a specification, reference being had to the accompanying drawing.

My invention relates to improvements in machines for grinding the valve-seats of locomotive engines; and the object of my invention is to provide a machine of this character which will prove simple in construction, cheap in manufacture and most efificient in operation.

In carrying out my invention I provide two baseblocks which are planed on top and bottom so as to be perfectly true. These are placed in position on the valve-chest of the locomotive. Each base-block carries a slide-block in which are formed holes for the reception of two shafts which extend from end to end of the machine and along with which the slide-blocks may be adjusted. On these shafts between the slide blocks is mounted a grinding-head and a device is provided for adjusting the grinding-head along the shafts. The grinding-head carries a journal-block in which is mounted a rotary shaft one end of which is connected preferably by means of a flexible shaft with any suitable source of power and upon the other end of which is mounted an emery wheel or other suit able grinding device. The grinding-head is formed with suitable guideways in which the journal block is fitted to slide; and a device is provided for raising and lowering the journal-block.

In the drawings illustrating the principle of my invention and the best mode now known to me of applying that principle, Figure 1 is a central longitudinal sectional view, the flexible shaft being shown removed," Fig. 2 is a plan view; Fig. 3 is an end view looking in the direction of the arrow A in Fig. l; and Fig. 4 is an end view looking in the direction of the arrow B in Fig. 1.

The bottom suri'ace a and the ways I) of the baseblock 0 are planed perfectly true. The lower face a is formed with a rectangular recess d which adapts the base-block to be seated accurately and firmly upon the top of the valve-chest to which it is bolted or otherwise I I I I I I I I I I I I suitably; secured. Upon the ways I) are mounted slidably the slide-blocksf, f, each of which is formed with a rectangular notch e in which fits the part b on top of the base-block. The ends of the guide-rods h are fitted in the apertures 9 formed in the slide-blocks f, f and are held therein by the set-screws i. Slidably mounted on the guide-rods h is the grinding-head j formed with the vertical guideways 7c in which is slidably fitted the journal-block t in which is journaled the rotary shaft m to the end it of which is se cured the flexible shaft 0 and upon the other end of which is mounted fast the emery wheel it. Mounted in the threaded aperture head j is an adjusting screw q the upper end of which is provided with a hand-wheel r and the lower end of which is grooved and in engagement with the lugs 8 formed on the journal-block t. By turning the handwheel I the journal-block t and thereby the emery wheel 11 are moved vertically and at right angles to the direction of the guide-rods h.

The grinding-head j is moved along the guide-rods h by means of a threaded rod or screw to one end of which engages the face-plate x of the grinding-head j and the other end of which passes through the threaded aperture 11 in the top of the slide-block f. The outer end of the screw 10 is provided with a handwheel y.

I claim:

In a machine of the character described, the combination of a pair of base-blocks each formed with ways upon its top; a pair of slideblocks one mounted on the top of each of said base-blocks; a pair of guiderods fitted in said s ideblocks and lying in a plane parallel to the ways upon the top of said baseblocks; a grinding-head mounted tree to slide along; said guide-rods and formed with guideways; a journal-block slidably fitted in said guideways; a rotary shaft mounted in said journal-block; a grinding wheel mounted on said shaft; means for moving said grinding head along" said guide-rods; and means for moving said journal-block vertically at right angles to the direction of said gui(le1'0ds; said slide-blocks being movable along the ways on top of said baseblocks horizontally and at rightangles to the direction of said guide-rods.

In testimony whereof I have hereunto set my hand this fifth day of February, A. D. 1907, at said Moberly in the presence of the undersigned witnesses.

JESSE ALBERT CHADIVICK.

Witnesses C. T. Rren, EDWIN O. DOYLE.

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